Impact of climate change on the kelp Laminaria digitata – simulated Arctic winter warming
The Arctic is seasonally exposed to long periods of low temperatures and complete darkness. Consequently, perennial primary producers have to apply strategies to maximize energy efficiency. Global warming is occurring in the Arctic faster than the rest of the globe. The highest amplitude of temperat...
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2024-11-01
|
| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2024.1478238/full |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846173025204961280 |
|---|---|
| author | Moritz Trautmann Inka Bartsch Margot Bligh Margot Bligh Hagen Buck-Wiese Jan-Hendrik Hehemann Jan-Hendrik Hehemann Sarina Niedzwiedz Niklas Plag Niklas Plag Tifeng Shan Kai Bischof Nora Diehl Nora Diehl |
| author_facet | Moritz Trautmann Inka Bartsch Margot Bligh Margot Bligh Hagen Buck-Wiese Jan-Hendrik Hehemann Jan-Hendrik Hehemann Sarina Niedzwiedz Niklas Plag Niklas Plag Tifeng Shan Kai Bischof Nora Diehl Nora Diehl |
| author_sort | Moritz Trautmann |
| collection | DOAJ |
| description | The Arctic is seasonally exposed to long periods of low temperatures and complete darkness. Consequently, perennial primary producers have to apply strategies to maximize energy efficiency. Global warming is occurring in the Arctic faster than the rest of the globe. The highest amplitude of temperature rise occurs during Polar Night. To determine the stress resistance of the ecosystem-engineering kelp Laminaria digitata against Arctic winter warming, non-meristematic discs of adult sporophytes from Porsangerfjorden (Finnmark, Norway) were kept in total darkness at 0°C and 5°C over a period of three months. Physiological variables, namely maximum quantum yield of photosynthesis (Fv/Fm) and dry weight, as well as underlying biochemical variables including pigments, storage carbohydrates, total carbon and total nitrogen were monitored throughout the experiment. Although all samples remained in generally good condition with Fv/Fm values above 0.6, L. digitata performed better at 0°C than at 5°C. Depletion of metabolic products resulted in a constant decrease of dry weight over time. A strong decrease in mannitol and laminarin was observed, with greater reductions at 5°C than at 0°C. However, the total carbon content did not change, indicating that the sporophytes were not suffering from “starvation stress” during the long period of darkness. A decline was also observed in the accessory pigments and the pool of xanthophyll cycle pigments, particularly at 5°C. Our results indicate that L. digitata has a more active metabolism, but a lower physiological and biochemical performance at higher temperatures in the Arctic winter. Obviously, L. digitata is well adapted to Arctic Polar Night conditions, regardless of having its distributional center at lower latitudes. Despite a reduced vitality at higher temperatures, a serious decline in Arctic populations of L. digitata due to winter warming is not expected for the near future. |
| format | Article |
| id | doaj-art-4c94454287c04ab89c17888836742052 |
| institution | Kabale University |
| issn | 2296-7745 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj-art-4c94454287c04ab89c178888367420522024-11-08T17:11:46ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452024-11-011110.3389/fmars.2024.14782381478238Impact of climate change on the kelp Laminaria digitata – simulated Arctic winter warmingMoritz Trautmann0Inka Bartsch1Margot Bligh2Margot Bligh3Hagen Buck-Wiese4Jan-Hendrik Hehemann5Jan-Hendrik Hehemann6Sarina Niedzwiedz7Niklas Plag8Niklas Plag9Tifeng Shan10Kai Bischof11Nora Diehl12Nora Diehl13Faculty of Biology and Chemistry & Center for Marine Environmental Sciences (MARUM), University of Bremen, Bremen, GermanyAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, GermanyFaculty of Biology and Chemistry & Center for Marine Environmental Sciences (MARUM), University of Bremen, Bremen, GermanyMax-Planck-Institute for Marine Microbiology, Bremen, GermanyMax-Planck-Institute for Marine Microbiology, Bremen, GermanyFaculty of Biology and Chemistry & Center for Marine Environmental Sciences (MARUM), University of Bremen, Bremen, GermanyMax-Planck-Institute for Marine Microbiology, Bremen, GermanyFaculty of Biology and Chemistry & Center for Marine Environmental Sciences (MARUM), University of Bremen, Bremen, GermanyInstitute of Biological Sciences, University of Rostock, Rostock, GermanyJulius Kühn-Institute (JKI) – Federal Research Centre for Cultivated Plants, Brunswick, GermanyInstitute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaFaculty of Biology and Chemistry & Center for Marine Environmental Sciences (MARUM), University of Bremen, Bremen, GermanyFaculty of Biology and Chemistry & Center for Marine Environmental Sciences (MARUM), University of Bremen, Bremen, GermanyAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, GermanyThe Arctic is seasonally exposed to long periods of low temperatures and complete darkness. Consequently, perennial primary producers have to apply strategies to maximize energy efficiency. Global warming is occurring in the Arctic faster than the rest of the globe. The highest amplitude of temperature rise occurs during Polar Night. To determine the stress resistance of the ecosystem-engineering kelp Laminaria digitata against Arctic winter warming, non-meristematic discs of adult sporophytes from Porsangerfjorden (Finnmark, Norway) were kept in total darkness at 0°C and 5°C over a period of three months. Physiological variables, namely maximum quantum yield of photosynthesis (Fv/Fm) and dry weight, as well as underlying biochemical variables including pigments, storage carbohydrates, total carbon and total nitrogen were monitored throughout the experiment. Although all samples remained in generally good condition with Fv/Fm values above 0.6, L. digitata performed better at 0°C than at 5°C. Depletion of metabolic products resulted in a constant decrease of dry weight over time. A strong decrease in mannitol and laminarin was observed, with greater reductions at 5°C than at 0°C. However, the total carbon content did not change, indicating that the sporophytes were not suffering from “starvation stress” during the long period of darkness. A decline was also observed in the accessory pigments and the pool of xanthophyll cycle pigments, particularly at 5°C. Our results indicate that L. digitata has a more active metabolism, but a lower physiological and biochemical performance at higher temperatures in the Arctic winter. Obviously, L. digitata is well adapted to Arctic Polar Night conditions, regardless of having its distributional center at lower latitudes. Despite a reduced vitality at higher temperatures, a serious decline in Arctic populations of L. digitata due to winter warming is not expected for the near future.https://www.frontiersin.org/articles/10.3389/fmars.2024.1478238/fullArctic amplificationC:NFv/Fmlaminarinmannitolpigments |
| spellingShingle | Moritz Trautmann Inka Bartsch Margot Bligh Margot Bligh Hagen Buck-Wiese Jan-Hendrik Hehemann Jan-Hendrik Hehemann Sarina Niedzwiedz Niklas Plag Niklas Plag Tifeng Shan Kai Bischof Nora Diehl Nora Diehl Impact of climate change on the kelp Laminaria digitata – simulated Arctic winter warming Frontiers in Marine Science Arctic amplification C:N Fv/Fm laminarin mannitol pigments |
| title | Impact of climate change on the kelp Laminaria digitata – simulated Arctic winter warming |
| title_full | Impact of climate change on the kelp Laminaria digitata – simulated Arctic winter warming |
| title_fullStr | Impact of climate change on the kelp Laminaria digitata – simulated Arctic winter warming |
| title_full_unstemmed | Impact of climate change on the kelp Laminaria digitata – simulated Arctic winter warming |
| title_short | Impact of climate change on the kelp Laminaria digitata – simulated Arctic winter warming |
| title_sort | impact of climate change on the kelp laminaria digitata simulated arctic winter warming |
| topic | Arctic amplification C:N Fv/Fm laminarin mannitol pigments |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2024.1478238/full |
| work_keys_str_mv | AT moritztrautmann impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT inkabartsch impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT margotbligh impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT margotbligh impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT hagenbuckwiese impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT janhendrikhehemann impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT janhendrikhehemann impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT sarinaniedzwiedz impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT niklasplag impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT niklasplag impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT tifengshan impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT kaibischof impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT noradiehl impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming AT noradiehl impactofclimatechangeonthekelplaminariadigitatasimulatedarcticwinterwarming |